Transparent side channel trigger mechanism on analog circuits with PAAST hardware Trojans

A transparent side channel trigger mechanism triggering Power/Area/Architecture and Signature Transparent (PAAST) analog hardware Trojans is discussed in this paper. By applying this trigger mechanism through normal supply bus, the circuit can be triggered to the Trojan state. Same as the stealth nature of PAAST Trojans, it doesn't require any additional area, any additional power, any structure modifications and it doesn't leave any signatures in either power domains or signal paths. This trigger mechanism can be applied on circuits with static Trojans or circuits with dynamic Trojans.